What: Green Missions specialist Mark Smallwood on how to treat soil, and Stephanie Suter from the Franklin County Soil and Water Conservation District on how to install a rain garden, in an event sponsored by Fairfield County master gardeners

Where: Liberty Center, 951 Liberty Dr., Lancaster

When: 10 a.m. Saturday

Cost: $20, includes lunch

Details: 740-653-5419 or fairfield.osu.edu

• FROM THE GROUND UP

What: vegetable garden workshops with Union County master gardeners

Where: Union County Agriculture Center, 18000 Rt. 4, Marysville

When: 1 to 3 p.m. Saturday

Cost: $5

Needed: reservations

Details: 937-644-8117 or e-mail unio@osu.edu

• MASTER GARDENERS

What: OSU Pickaway County master gardener volunteer classes

When: April 7

Details: an application can be picked up at the extension office, 110 Island Rd., Circleville; 740-474-7534

CONSERVATORY

The following will be featured at the Franklin Park Conservatory, 1777 E. Broad St. Call 614-645-5923 or visit fpconservatory.org for registration and more information.

• ENCHANTED EXPRESS

What: an indoor garden railway traveling past small-scale architectural wonders of the world

Cercis canadensis 'Alba' is well-known for its profuse, pealike white flowers that appear in spring. Heart-shaped leaves predominate throughout the summer, changing to yellow in the fall. This is a small tree that might branch close to the ground. Orange-brown bark appears as the tree ages; its life span is perhaps 10 to 20 years. Soil conditions should be moist, rich and well-drained where partial sun to partial shade predominate. Alba has been known to accept many types of soils and soil pHs, but keep it away from wet areas. It is used as a patio tree, foundation, specimen, in a group planting or with other species for color contrast. Albas can be seen surrounding the Lois B. Small and Gladys B. Hamilton Labyrinth Garden, near the entrance to the main garden along Lane Avenue.

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